1 #ifndef QEMU_H 2 #define QEMU_H 3 4 #include <signal.h> 5 #include <string.h> 6 7 #include "cpu.h" 8 9 #undef DEBUG_REMAP 10 #ifdef DEBUG_REMAP 11 #include <stdlib.h> 12 #endif /* DEBUG_REMAP */ 13 14 #include "exec/user/abitypes.h" 15 16 #include "exec/user/thunk.h" 17 #include "syscall_defs.h" 18 #include "syscall.h" 19 #include "target_signal.h" 20 #include "exec/gdbstub.h" 21 #include "qemu/queue.h" 22 23 #if defined(CONFIG_USE_NPTL) 24 #define THREAD __thread 25 #else 26 #define THREAD 27 #endif 28 29 /* This struct is used to hold certain information about the image. 30 * Basically, it replicates in user space what would be certain 31 * task_struct fields in the kernel 32 */ 33 struct image_info { 34 abi_ulong load_bias; 35 abi_ulong load_addr; 36 abi_ulong start_code; 37 abi_ulong end_code; 38 abi_ulong start_data; 39 abi_ulong end_data; 40 abi_ulong start_brk; 41 abi_ulong brk; 42 abi_ulong start_mmap; 43 abi_ulong mmap; 44 abi_ulong rss; 45 abi_ulong start_stack; 46 abi_ulong stack_limit; 47 abi_ulong entry; 48 abi_ulong code_offset; 49 abi_ulong data_offset; 50 abi_ulong saved_auxv; 51 abi_ulong auxv_len; 52 abi_ulong arg_start; 53 abi_ulong arg_end; 54 uint32_t elf_flags; 55 int personality; 56 #ifdef CONFIG_USE_FDPIC 57 abi_ulong loadmap_addr; 58 uint16_t nsegs; 59 void *loadsegs; 60 abi_ulong pt_dynamic_addr; 61 struct image_info *other_info; 62 #endif 63 }; 64 65 #ifdef TARGET_I386 66 /* Information about the current linux thread */ 67 struct vm86_saved_state { 68 uint32_t eax; /* return code */ 69 uint32_t ebx; 70 uint32_t ecx; 71 uint32_t edx; 72 uint32_t esi; 73 uint32_t edi; 74 uint32_t ebp; 75 uint32_t esp; 76 uint32_t eflags; 77 uint32_t eip; 78 uint16_t cs, ss, ds, es, fs, gs; 79 }; 80 #endif 81 82 #ifdef TARGET_ARM 83 /* FPU emulator */ 84 #include "nwfpe/fpa11.h" 85 #endif 86 87 #define MAX_SIGQUEUE_SIZE 1024 88 89 struct sigqueue { 90 struct sigqueue *next; 91 target_siginfo_t info; 92 }; 93 94 struct emulated_sigtable { 95 int pending; /* true if signal is pending */ 96 struct sigqueue *first; 97 struct sigqueue info; /* in order to always have memory for the 98 first signal, we put it here */ 99 }; 100 101 /* NOTE: we force a big alignment so that the stack stored after is 102 aligned too */ 103 typedef struct TaskState { 104 pid_t ts_tid; /* tid (or pid) of this task */ 105 #ifdef TARGET_ARM 106 /* FPA state */ 107 FPA11 fpa; 108 int swi_errno; 109 #endif 110 #ifdef TARGET_UNICORE32 111 int swi_errno; 112 #endif 113 #if defined(TARGET_I386) && !defined(TARGET_X86_64) 114 abi_ulong target_v86; 115 struct vm86_saved_state vm86_saved_regs; 116 struct target_vm86plus_struct vm86plus; 117 uint32_t v86flags; 118 uint32_t v86mask; 119 #endif 120 #ifdef CONFIG_USE_NPTL 121 abi_ulong child_tidptr; 122 #endif 123 #ifdef TARGET_M68K 124 int sim_syscalls; 125 #endif 126 #if defined(TARGET_ARM) || defined(TARGET_M68K) || defined(TARGET_UNICORE32) 127 /* Extra fields for semihosted binaries. */ 128 uint32_t heap_base; 129 uint32_t heap_limit; 130 #endif 131 uint32_t stack_base; 132 int used; /* non zero if used */ 133 struct image_info *info; 134 struct linux_binprm *bprm; 135 136 struct emulated_sigtable sigtab[TARGET_NSIG]; 137 struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */ 138 struct sigqueue *first_free; /* first free siginfo queue entry */ 139 int signal_pending; /* non zero if a signal may be pending */ 140 } __attribute__((aligned(16))) TaskState; 141 142 extern char *exec_path; 143 void init_task_state(TaskState *ts); 144 void task_settid(TaskState *); 145 void stop_all_tasks(void); 146 extern const char *qemu_uname_release; 147 extern unsigned long mmap_min_addr; 148 149 /* ??? See if we can avoid exposing so much of the loader internals. */ 150 /* 151 * MAX_ARG_PAGES defines the number of pages allocated for arguments 152 * and envelope for the new program. 32 should suffice, this gives 153 * a maximum env+arg of 128kB w/4KB pages! 154 */ 155 #define MAX_ARG_PAGES 33 156 157 /* Read a good amount of data initially, to hopefully get all the 158 program headers loaded. */ 159 #define BPRM_BUF_SIZE 1024 160 161 /* 162 * This structure is used to hold the arguments that are 163 * used when loading binaries. 164 */ 165 struct linux_binprm { 166 char buf[BPRM_BUF_SIZE] __attribute__((aligned)); 167 void *page[MAX_ARG_PAGES]; 168 abi_ulong p; 169 int fd; 170 int e_uid, e_gid; 171 int argc, envc; 172 char **argv; 173 char **envp; 174 char * filename; /* Name of binary */ 175 int (*core_dump)(int, const CPUArchState *); /* coredump routine */ 176 }; 177 178 void do_init_thread(struct target_pt_regs *regs, struct image_info *infop); 179 abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp, 180 abi_ulong stringp, int push_ptr); 181 int loader_exec(const char * filename, char ** argv, char ** envp, 182 struct target_pt_regs * regs, struct image_info *infop, 183 struct linux_binprm *); 184 185 int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, 186 struct image_info * info); 187 int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, 188 struct image_info * info); 189 190 abi_long memcpy_to_target(abi_ulong dest, const void *src, 191 unsigned long len); 192 void target_set_brk(abi_ulong new_brk); 193 abi_long do_brk(abi_ulong new_brk); 194 void syscall_init(void); 195 abi_long do_syscall(void *cpu_env, int num, abi_long arg1, 196 abi_long arg2, abi_long arg3, abi_long arg4, 197 abi_long arg5, abi_long arg6, abi_long arg7, 198 abi_long arg8); 199 void gemu_log(const char *fmt, ...) GCC_FMT_ATTR(1, 2); 200 extern THREAD CPUArchState *thread_env; 201 void cpu_loop(CPUArchState *env); 202 char *target_strerror(int err); 203 int get_osversion(void); 204 void fork_start(void); 205 void fork_end(int child); 206 207 /* Creates the initial guest address space in the host memory space using 208 * the given host start address hint and size. The guest_start parameter 209 * specifies the start address of the guest space. guest_base will be the 210 * difference between the host start address computed by this function and 211 * guest_start. If fixed is specified, then the mapped address space must 212 * start at host_start. The real start address of the mapped memory space is 213 * returned or -1 if there was an error. 214 */ 215 unsigned long init_guest_space(unsigned long host_start, 216 unsigned long host_size, 217 unsigned long guest_start, 218 bool fixed); 219 220 #include "qemu/log.h" 221 222 /* syscall.c */ 223 int host_to_target_waitstatus(int status); 224 225 /* strace.c */ 226 void print_syscall(int num, 227 abi_long arg1, abi_long arg2, abi_long arg3, 228 abi_long arg4, abi_long arg5, abi_long arg6); 229 void print_syscall_ret(int num, abi_long arg1); 230 extern int do_strace; 231 232 /* signal.c */ 233 void process_pending_signals(CPUArchState *cpu_env); 234 void signal_init(void); 235 int queue_signal(CPUArchState *env, int sig, target_siginfo_t *info); 236 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info); 237 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo); 238 int target_to_host_signal(int sig); 239 int host_to_target_signal(int sig); 240 long do_sigreturn(CPUArchState *env); 241 long do_rt_sigreturn(CPUArchState *env); 242 abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp); 243 244 #ifdef TARGET_I386 245 /* vm86.c */ 246 void save_v86_state(CPUX86State *env); 247 void handle_vm86_trap(CPUX86State *env, int trapno); 248 void handle_vm86_fault(CPUX86State *env); 249 int do_vm86(CPUX86State *env, long subfunction, abi_ulong v86_addr); 250 #elif defined(TARGET_SPARC64) 251 void sparc64_set_context(CPUSPARCState *env); 252 void sparc64_get_context(CPUSPARCState *env); 253 #endif 254 255 /* mmap.c */ 256 int target_mprotect(abi_ulong start, abi_ulong len, int prot); 257 abi_long target_mmap(abi_ulong start, abi_ulong len, int prot, 258 int flags, int fd, abi_ulong offset); 259 int target_munmap(abi_ulong start, abi_ulong len); 260 abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size, 261 abi_ulong new_size, unsigned long flags, 262 abi_ulong new_addr); 263 int target_msync(abi_ulong start, abi_ulong len, int flags); 264 extern unsigned long last_brk; 265 extern abi_ulong mmap_next_start; 266 void mmap_lock(void); 267 void mmap_unlock(void); 268 abi_ulong mmap_find_vma(abi_ulong, abi_ulong); 269 void cpu_list_lock(void); 270 void cpu_list_unlock(void); 271 #if defined(CONFIG_USE_NPTL) 272 void mmap_fork_start(void); 273 void mmap_fork_end(int child); 274 #endif 275 276 /* main.c */ 277 extern unsigned long guest_stack_size; 278 279 /* user access */ 280 281 #define VERIFY_READ 0 282 #define VERIFY_WRITE 1 /* implies read access */ 283 284 static inline int access_ok(int type, abi_ulong addr, abi_ulong size) 285 { 286 return page_check_range((target_ulong)addr, size, 287 (type == VERIFY_READ) ? PAGE_READ : (PAGE_READ | PAGE_WRITE)) == 0; 288 } 289 290 /* NOTE __get_user and __put_user use host pointers and don't check access. 291 These are usually used to access struct data members once the struct has 292 been locked - usually with lock_user_struct. */ 293 294 /* Tricky points: 295 - Use __builtin_choose_expr to avoid type promotion from ?:, 296 - Invalid sizes result in a compile time error stemming from 297 the fact that abort has no parameters. 298 - It's easier to use the endian-specific unaligned load/store 299 functions than host-endian unaligned load/store plus tswapN. */ 300 301 #define __put_user_e(x, hptr, e) \ 302 (__builtin_choose_expr(sizeof(*(hptr)) == 1, stb_p, \ 303 __builtin_choose_expr(sizeof(*(hptr)) == 2, stw_##e##_p, \ 304 __builtin_choose_expr(sizeof(*(hptr)) == 4, stl_##e##_p, \ 305 __builtin_choose_expr(sizeof(*(hptr)) == 8, stq_##e##_p, abort)))) \ 306 ((hptr), (x)), 0) 307 308 #define __get_user_e(x, hptr, e) \ 309 ((x) = (typeof(*hptr))( \ 310 __builtin_choose_expr(sizeof(*(hptr)) == 1, ldub_p, \ 311 __builtin_choose_expr(sizeof(*(hptr)) == 2, lduw_##e##_p, \ 312 __builtin_choose_expr(sizeof(*(hptr)) == 4, ldl_##e##_p, \ 313 __builtin_choose_expr(sizeof(*(hptr)) == 8, ldq_##e##_p, abort)))) \ 314 (hptr)), 0) 315 316 #ifdef TARGET_WORDS_BIGENDIAN 317 # define __put_user(x, hptr) __put_user_e(x, hptr, be) 318 # define __get_user(x, hptr) __get_user_e(x, hptr, be) 319 #else 320 # define __put_user(x, hptr) __put_user_e(x, hptr, le) 321 # define __get_user(x, hptr) __get_user_e(x, hptr, le) 322 #endif 323 324 /* put_user()/get_user() take a guest address and check access */ 325 /* These are usually used to access an atomic data type, such as an int, 326 * that has been passed by address. These internally perform locking 327 * and unlocking on the data type. 328 */ 329 #define put_user(x, gaddr, target_type) \ 330 ({ \ 331 abi_ulong __gaddr = (gaddr); \ 332 target_type *__hptr; \ 333 abi_long __ret; \ 334 if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \ 335 __ret = __put_user((x), __hptr); \ 336 unlock_user(__hptr, __gaddr, sizeof(target_type)); \ 337 } else \ 338 __ret = -TARGET_EFAULT; \ 339 __ret; \ 340 }) 341 342 #define get_user(x, gaddr, target_type) \ 343 ({ \ 344 abi_ulong __gaddr = (gaddr); \ 345 target_type *__hptr; \ 346 abi_long __ret; \ 347 if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \ 348 __ret = __get_user((x), __hptr); \ 349 unlock_user(__hptr, __gaddr, 0); \ 350 } else { \ 351 /* avoid warning */ \ 352 (x) = 0; \ 353 __ret = -TARGET_EFAULT; \ 354 } \ 355 __ret; \ 356 }) 357 358 #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong) 359 #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long) 360 #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t) 361 #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t) 362 #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t) 363 #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t) 364 #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t) 365 #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t) 366 #define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t) 367 #define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t) 368 369 #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong) 370 #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long) 371 #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t) 372 #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t) 373 #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t) 374 #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t) 375 #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t) 376 #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t) 377 #define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t) 378 #define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t) 379 380 /* copy_from_user() and copy_to_user() are usually used to copy data 381 * buffers between the target and host. These internally perform 382 * locking/unlocking of the memory. 383 */ 384 abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len); 385 abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len); 386 387 /* Functions for accessing guest memory. The tget and tput functions 388 read/write single values, byteswapping as necessary. The lock_user 389 gets a pointer to a contiguous area of guest memory, but does not perform 390 and byteswapping. lock_user may return either a pointer to the guest 391 memory, or a temporary buffer. */ 392 393 /* Lock an area of guest memory into the host. If copy is true then the 394 host area will have the same contents as the guest. */ 395 static inline void *lock_user(int type, abi_ulong guest_addr, long len, int copy) 396 { 397 if (!access_ok(type, guest_addr, len)) 398 return NULL; 399 #ifdef DEBUG_REMAP 400 { 401 void *addr; 402 addr = malloc(len); 403 if (copy) 404 memcpy(addr, g2h(guest_addr), len); 405 else 406 memset(addr, 0, len); 407 return addr; 408 } 409 #else 410 return g2h(guest_addr); 411 #endif 412 } 413 414 /* Unlock an area of guest memory. The first LEN bytes must be 415 flushed back to guest memory. host_ptr = NULL is explicitly 416 allowed and does nothing. */ 417 static inline void unlock_user(void *host_ptr, abi_ulong guest_addr, 418 long len) 419 { 420 421 #ifdef DEBUG_REMAP 422 if (!host_ptr) 423 return; 424 if (host_ptr == g2h(guest_addr)) 425 return; 426 if (len > 0) 427 memcpy(g2h(guest_addr), host_ptr, len); 428 free(host_ptr); 429 #endif 430 } 431 432 /* Return the length of a string in target memory or -TARGET_EFAULT if 433 access error. */ 434 abi_long target_strlen(abi_ulong gaddr); 435 436 /* Like lock_user but for null terminated strings. */ 437 static inline void *lock_user_string(abi_ulong guest_addr) 438 { 439 abi_long len; 440 len = target_strlen(guest_addr); 441 if (len < 0) 442 return NULL; 443 return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1); 444 } 445 446 /* Helper macros for locking/ulocking a target struct. */ 447 #define lock_user_struct(type, host_ptr, guest_addr, copy) \ 448 (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy)) 449 #define unlock_user_struct(host_ptr, guest_addr, copy) \ 450 unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0) 451 452 #if defined(CONFIG_USE_NPTL) 453 #include <pthread.h> 454 #endif 455 456 #endif /* QEMU_H */ 457